Y at Sophia University in Tokyo, Japan.Dementia (London). Author manuscript

Y at Sophia University in Tokyo, Japan.Dementia (London). Author manuscript; available in PMC 2016 July 01.Ingersoll-Dayton et al.PageMio Ito is a doctoral-trained nursing researcher. Her research is on dementia care in nursing homes and family caregiving. She is a Researcher at the Tokyo Metropolitan Institute of Gerontology, Japan.Author Manuscript Author Manuscript Author Manuscript Author Manuscript
HHS Public AccessAuthor manuscriptMed Decis Making. Author manuscript; available in PMC 2017 June 02.Published in final edited form as: Med Decis Making. 2011 ; 31(1): 143?50. doi:10.1177/0272989X10369006.Author Manuscript Author Manuscript Author Manuscript Author ManuscriptEffect of Arrangement of Stick Figures on Estimates of Proportion in Risk GraphicsJessica S. Ancker, MPH, PhD, Elke U. Weber, PhD, and Rita Kukafka, DrPH, MA Department of Biomedical Informatics, College of Physicians and Surgeons (JSA, RK); Department of Psychology (EUW); Department of Management, Columbia University Business School (EUW); and Department of LY317615 chemical information Sociomedical Sciences, Mailman School of Public Health (RK), Columbia University, New York, New YorkAbstractBackground–Health risks are sometimes illustrated with stick figures, with a certain proportion colored to indicate they are affected by the disease. Perception of these graphics may be affected by whether the affected stick figures are scattered randomly throughout the group or arranged in a block. Objective–To assess the effects of stick-figure arrangement on first impressions of estimates of proportion, under a 10-s deadline. Design–Questionnaire. Participants and Setting–Respondents recruited online (n = 100) or in waiting rooms at an urban hospital (n = 65). Intervention–Participants were asked to estimate the proportion represented in 6 unlabeled graphics, half randomly arranged and half sequentially arranged. Measurements–Estimated proportions. Results–Although average estimates were fairly good, the variability of estimates was high. Overestimates of random graphics were larger than overestimates of sequential ones, except when the proportion was near 50 ; variability was also higher with random graphics. Although the average inaccuracy was modest, it was large enough that more than one quarter of respondents confused 2 graphics depicting proportions that differed by 11 percentage points. Low numeracy and educational level were associated with inaccuracy. Limitations–Participants estimated proportions but did not report perceived risk. Conclusions–Randomly arranged arrays of stick figures JC-1 web should be used with care because viewers’ ability to estimate the proportion in these graphics is so poor that moderate differences between risks may not be visible. In addition, random arrangements may create an initial impression that proportions, especially large ones, are larger than they are.Address correspondence to Jessica S. Ancker, MPH, PhD, Division of Quality and Medical Informatics, Department of Pediatrics, Weill Conell Medical College, 402 E. 67th Street, LA-251, New York, NY 10065.Ancker et al.PageKeywords cost utility analysis; randomized trial methodology; risk stratification; population-based studies; scale development/ validation Stick-figure graphics are frequently used to illustrate health risks in educational and decision support materials for patients and consumers.1,2 These graphics (sometimes called pictographs or icon graphics) are often considered appropriate for patients with low.Y at Sophia University in Tokyo, Japan.Dementia (London). Author manuscript; available in PMC 2016 July 01.Ingersoll-Dayton et al.PageMio Ito is a doctoral-trained nursing researcher. Her research is on dementia care in nursing homes and family caregiving. She is a Researcher at the Tokyo Metropolitan Institute of Gerontology, Japan.Author Manuscript Author Manuscript Author Manuscript Author Manuscript
HHS Public AccessAuthor manuscriptMed Decis Making. Author manuscript; available in PMC 2017 June 02.Published in final edited form as: Med Decis Making. 2011 ; 31(1): 143?50. doi:10.1177/0272989X10369006.Author Manuscript Author Manuscript Author Manuscript Author ManuscriptEffect of Arrangement of Stick Figures on Estimates of Proportion in Risk GraphicsJessica S. Ancker, MPH, PhD, Elke U. Weber, PhD, and Rita Kukafka, DrPH, MA Department of Biomedical Informatics, College of Physicians and Surgeons (JSA, RK); Department of Psychology (EUW); Department of Management, Columbia University Business School (EUW); and Department of Sociomedical Sciences, Mailman School of Public Health (RK), Columbia University, New York, New YorkAbstractBackground–Health risks are sometimes illustrated with stick figures, with a certain proportion colored to indicate they are affected by the disease. Perception of these graphics may be affected by whether the affected stick figures are scattered randomly throughout the group or arranged in a block. Objective–To assess the effects of stick-figure arrangement on first impressions of estimates of proportion, under a 10-s deadline. Design–Questionnaire. Participants and Setting–Respondents recruited online (n = 100) or in waiting rooms at an urban hospital (n = 65). Intervention–Participants were asked to estimate the proportion represented in 6 unlabeled graphics, half randomly arranged and half sequentially arranged. Measurements–Estimated proportions. Results–Although average estimates were fairly good, the variability of estimates was high. Overestimates of random graphics were larger than overestimates of sequential ones, except when the proportion was near 50 ; variability was also higher with random graphics. Although the average inaccuracy was modest, it was large enough that more than one quarter of respondents confused 2 graphics depicting proportions that differed by 11 percentage points. Low numeracy and educational level were associated with inaccuracy. Limitations–Participants estimated proportions but did not report perceived risk. Conclusions–Randomly arranged arrays of stick figures should be used with care because viewers’ ability to estimate the proportion in these graphics is so poor that moderate differences between risks may not be visible. In addition, random arrangements may create an initial impression that proportions, especially large ones, are larger than they are.Address correspondence to Jessica S. Ancker, MPH, PhD, Division of Quality and Medical Informatics, Department of Pediatrics, Weill Conell Medical College, 402 E. 67th Street, LA-251, New York, NY 10065.Ancker et al.PageKeywords cost utility analysis; randomized trial methodology; risk stratification; population-based studies; scale development/ validation Stick-figure graphics are frequently used to illustrate health risks in educational and decision support materials for patients and consumers.1,2 These graphics (sometimes called pictographs or icon graphics) are often considered appropriate for patients with low.